Pedal.



A. w. LAWSON. PEDAL.

APPLICATION FILED JAN. 5, 1918. 1,287,356. Patented DEC-10,1918.

2 SHEETS-SHEET I.

A. W. LAWSON.

PEDAL.

APiLICATlON FILED JAN- in 1918.

Patented Dec. 10, 1918.

2 SHEETSSHEET 2.

HLFRED W. Lawson! ALFRED W. LAWSON; OF GREEN BAY, WISCONSIN.

PEDAL.

Specification of Letters Patent.

Patented Doc. 1Q, 1918.

Application nee January 5, 1918. Serial No. 210,580.

To all whom it may concern:

Be it known thatli, ALFRED W. Lawson, a citizen of the United States, residing at Green Bay, in the county of Brown and State of Wisconsin, have invented certain new and useful Improvements in Pedals, of

which the following is a specification, reference being had to the accompanying drawings.

This invention relates to certain'improvements in pedals and has relation more particularly to a device of this general character especially designed and adapted for use in connection with the rudder bar of an aeroplane orv the like and it is an'object of the invention to provide a novel and improved device of this general character which may be readily engaged and disengaged from the bar.

It is also an object of the invention to provide a pedal embodying an electrical heating unit which when the pedal is appliedto the rudder bar is properly interposed within an electrical current so that the foot of an aviator or other person is kept warm irrespective of the altitudewhich the aeroplane may reach.

An additional object of the invention is to provide a novel and improved pedal having suitably arranged therein an electrical heating coil having its terminals connected with a pair of securing plates together with a rudder bar provided with sockets to receive said plates, said sockets being in connection with a source of electrical energy so that upon insertion of the plates or plugs within the sockets a circuit will be closed resulting in the desired radiation of heat from the coil carried by the pedal.

A. still further object of the invention is to provide a novel and improved construction embodying a pedal provided with a air of arms or plugs insertible within soc ets suitably carried by a rudder bar or the like together with means carried by the rudder bar and coacting with the plates or plugs for locking the pedal to the rudder bar.

The invention consists in the details of construction and in the combination and arrangement of the several parts of my im-' proved pedal whereby certain important advantages are attained and the device rendered simpler, less expensive and otherwise The novel features of my invention will hereinafter be definitely claimed.

In order that my invention may be the better understood. I will now proceed to describe the same with reference to the accompanying drawings, wherein: I

Figure l 1s a view intop plan with portions broken away illustratingvan embodiment of my invention;

Fig. 2 is an enlarged fragmentary view in elevation of an end portion of the rudder bar as herein disclosed;

Fig. 3 is a-sectional View taken substantially on the line 33 of Fig. 2;

Fig. 4 is a longitudinal sectional view takenthrough a pedal as herein set forth;

Fig. 5 is a transverse sectional view taken substantially on the line 5-5 of Fig. 4c; and Fig. (i is a view in perspective of a pedal as herein included.

As disclosed in the accompanying drawings R denotes'a rudder bar adapted to be pivotally engaged as at 2 at substantially its longitudinal center for swinging movement. As is particularly illustrated in Fig. 3, it is to be observed that the bar R comprises two superimposed strips or layers 3 of insulating material and which are maintained in assembled relation through the medium of the rivets or other fastening means. Coacting with the opposite end portions of the strips 3 are the tips or caps 5 maintained in applied position by the bolts 6 or the'like which also serve as an additional medium for maintaining the strips or layers 3 in assembled relation. The caps or tips 5 are provided with'the perforate ears 7 with which the flexible members leading to: the rudder of an aeroplane are adapted to be connected.

Each end portion of the bar R has interposed between the strips ,or layers 3 thereof a pair of metallic sockets 8 maintained in applied position in any desired manner, but preferably through the mediumof the screws 9 as is particularly illustrated in Fig. 20f the accompanying drawings. The inner sockets of both pairs of sockets 8 are electrically connected by the conductor a while the outer sockets are in connection with a suitable source of electrical energy, through the medium of the conductors b. The conductors a and b may be arranged in a manner which best meets with the requirements of practice but as is particularly illustrated in Figs; 1 and 3, said con: ductors a and I) being arranged within the channels orpassage ways 10 formed in the inner face of one or both of the strips'or. layers 3 of the bar R.-.

Each of the pedals P is of slipper formation and includes an outer metallic sole or plate 11 to which are secured to the ball portion thereof a pair of plates orplugs'14 and one of said plugs is insulated as at 15 from the plate 11. The plates or plugs 14 y are in predetermined transverse spaced relation and the extended or free end portions thereof are adapted to be snugly received within a pair ofsockets 8. Imposed upon the sole or plate 11 are the laminations-16 of asbestos 0r similar material and interposed between certain of said laminations 16 is a heating coil 17 having its terminals suitably connected with the plates 14 so that when a pair of. pedals are operatively engaged with the opposite end portions of the bar R an electrical circuit will be closed resulting in the requisite radiation of heat from each of the coils 17 so that-the foot-- of the aviator or'other person-engaged with, the pedal P will be maintained warm irrespective of the altitude the' aeroplane may reach.

Each of the arms or plugs 14 is provided at a predetermined point intermediate its length with an opening 18 adapted to receive the suitable openings 19 produced in the coacting socket 8. The upper opening 19 is in register with a recess or pocket 20 formed in the inner face. ofthe upper layer or strip 3 while the lower opening 19 is in communication with the opening 21 ex-' tending through the lower strip or-layer 3. The opening 21 is provided with a metallic lining 22.

23 denotes a pin extending upwardly through the lower strip or layer 3 of the rod R and is of a length to extend through the registering openings 18 and 19- and into the recess or pocket 20 so that the arm or plug 14 will be effectively locked to the rudder bar R. The pin 23 is provided with the enlarged channeled head 24 arranged below the rudder bar R and .which serves to limit the upward movement of the pin 23. Straddling the grooved head 24 is a yoke 25 of a key 26. The key 26 is substantially L-shape in form and has its stem extending upwardly and pivotally engaged as at 27 between the spaced cars 28 extending forwardly from the bar R. The upper end portion of the arm of the key 26is provided with a button 29 or the like to facilitate imparting to the key 26 the requisite rocking movement to withdraw the pin 23 from operative engagement with an arm or plug 14 so that the pedal P may be readily removed.

The pin 23 is normally maintained at the limit of its upward or inward movement claimed.

through the medium of the retractile member herein' disclosed as a coil spring suitably anchored at one end to the key 26 below its pivotal mounting'27 and at its opposite end to a plate 31 suitably carried by the lower face of the rod or bar R. As is particularly illustrated in Fig. 3, the pin 23 is also loosely directed through the plate 31. r

From the foregoing. description, it is thought to be obvious that a pedal construct- .ed in accordance with my invention is parthe convenience and facility with which it may be assembled and operated andit will also be obvious that my invention is susceptibleof some? change and modification without departing from the principles and spirit thereof-and for this reason I do not wish to be understood as limiting myself to the precise arrangement and formation of the several parts herem shown in'carrymg out my invention in practice except as hereinafter I claim: I 1.'In combination with the'rudder bar of an aeroplane or other similar structure, a pedal engaged therewith, and heat radiating means carried by the pedal.

2. The combination" with an operating member, a pedal connected thereto, and heat radiating means carried by the pedal.

3. The combination with an operating member,-a pedal connected thereto, and heat radiating means carried by the pedal, said ticularlywell adapted for use by reason of pedal, plugs carried by the pedal and insertible within the Sockets of the member, a heating coll having its extremities connected to the plugs, and means coacting with said member-and the plugs for holding the plugs normally against withdrawal from within the sockets.

6. In combination with the rudder bar of an aeroplane or other similar structure, pedals carried by the opposite end portions of the bar, and electrically operated heating means carried by the pedals and connected in series.

7. In combination with the rudder bar of an aeroplane or other similar structure, pedals carried by the opposite end portions of the bar, and electrically operated heating means carried by the pedals and connected in series, each of said pedals being independently secured to the bar.

8. In combination with the rudder bar'of an aeroplane Or other similar structure, a pedal, an electric heater carried by the pedal, and coacting means carried by the pedal and the bar for mounting the pedal upon the bar and for energizing the electric heater when the pedal is in position upon the bar.

9. In combination with an operating member, sockets carried by said member and adapted for connection with a source of electrical energy, a pedal,.p1ugs carried by the pedal and insertible Within the sockets of the member, and a heating coil carried by the pedal and having its extremities connected to the plugs, said plugs and sockets coacting to secure'the pedal to the operating member. In testimony whereof I hereunto afiix my signature in the presence of two Witnesses.

ALFRED W. LAWSON. VVitnesses:

W. E. LAwsoN, G. E, LEWIS. 

